超声波/臭氧联合降解水中氟苯的研究

Degradation of Fluorobenzene in Aqueous Solution by Ozonation Combined with Sonolysis

采用超声波/臭氧联合降解含氟苯模拟废水。研究了对氟苯降解过程的影响因素,考察了反应初始p H、臭氧投放量、超声波强度、反应温度对超声波/臭氧联合降解氟苯的速率影响。结果表明,当氟苯初始浓度为50 mg·L-1,p H=11.07,臭氧投量88 mg·min-1,超声波密度0.3W·m L-1时,常温反应45 min后氟苯的去除率达98%。通过GC-MS测定,推测氟苯的反应主要为·OH自由基主导的自由基降解反应。

The degradation of fluorobenzene in aqueous solution with combination of sonolysis and ozonation was investigated in laboratory-scale experiments. The influence of pH value, ozone dose, ultrasound energy density and reaction temperature on the reaction was investigated. Experimental results showed that, ozonation combined with sonolysis is effective for treatment of the FB, up to 98 % was removed after 45 rain reaction with ozone dose 88 mg·min^-1, pH value 11.07, US energy density 0.3 W·mL^-1, and temperature of 25 ℃. During the degradationg of fluorobenzene by sonolysis and ozonation by gas chromatography-mass spectrometry （GC-MS）, -OH is an important degeration of the degration.